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03-23-2018, 10:00 PM

#1621

soot

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Quote:

Originally Posted by moocow

I don't see a problem with that, though it would increase drag. But why wouldn't just you make a wider or longer spoiler?

I was just curious if it had been done, and if not why? To me that's like saying why not just get a bigger wing instead of adding endplates to one. Endplates make a wing much more effective, so I was wondering if the same would happen with a spoiler.
Also a wider or longer spoiler will add more drag as well. If I add 'endplates' to this one I don't have to make a new spoiler, and maybe those endplates have an improved down force to drag ratio compared to making a larger spoiler.

guess I'll just try it myself!

03-24-2018, 07:25 AM

#1622

hector

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Google Jeff Keisel and his EM car. Must be worth something for him to do it.

03-26-2018, 06:01 AM

#1623

HarryB

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Endplates have also another interesting effect if you think the car when cornering (or even sliding). Downforce in straight line does not matter much.

03-26-2018, 01:11 PM

#1624

icantlearn

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What is this, "interesting effect"?

03-26-2018, 01:18 PM

#1625

ryansmoneypit

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Quote:

Originally Posted by MiataMan00

What is this, "interesting effect"?

thrust vectoring.

03-26-2018, 01:18 PM

#1626

emilio700

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Quote:

Originally Posted by HarryB

Endplates have also another interesting effect if you think the car when cornering (or even sliding). Downforce in straight line does not matter much.

Until you get to the braking zone, then it's critical to lap times.

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03-26-2018, 01:33 PM

#1627

icantlearn

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Quote:

Originally Posted by ryansmoneypit

thrust vectoring.

enlighten me? Unless the high pressure region on top of the wing is lower than the "thrust" trying to enter, I dont see how this is a thing, especially with larger endplates. Or am I missing something?

03-26-2018, 03:40 PM

#1628

ryansmoneypit

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Quote:

Originally Posted by MiataMan00

I was half kidding with that but... if you consider how hard the end-plates might try to straighten the car out when its sideways, then maybe that term loosely applies.

03-27-2018, 06:22 AM

#1629

HarryB

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That. Depends on the relative size of endplates of course (and their stiffness), but it can be pretty significant. Also, Emilio is (as usual) right, I should have said "excluding braking"

Last edited by HarryB; 03-28-2018 at 03:44 AM.

03-27-2018, 12:06 PM

#1630

Blackbird

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Quote:

Originally Posted by ryansmoneypit

I was half kidding with that but... if you consider how hard the end-plates might try to straighten the car out when its sideways, then maybe that term loosely applies.

That's half the picture, big end plates also turn the car as you turn the steering wheel.

03-27-2018, 03:42 PM

#1631

lightyear

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Big end plates do look like a rudder.

03-27-2018, 06:06 PM

#1632

OGRacing

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i like that ^

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03-27-2018, 06:27 PM

#1633

Full_Tilt_Boogie

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Quote:

Originally Posted by lightyear

*coming up to a right hand turn*

"Avast! Reverse engines! Broach to starboard!"

03-28-2018, 03:45 AM

#1634

HarryB

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Speaking of...who said active aero should be limited on the horizontal plane of the wing anyways? That's something my ex-FSAE team is actually experimenting with.

03-28-2018, 08:43 AM

#1635

Blackbird

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IIRC both Porsche and Audi had some cheater end plates on their LMP1 a few years ago where there was some amount of "deflection".

03-28-2018, 10:04 AM

#1636

Midtenn

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Quote:

Originally Posted by Blackbird

IIRC both Porsche and Audi had some cheater end plates on their LMP1 a few years ago where there was some amount of "deflection".

Toyota and Porsche both had rear body work that flexed down at high speed to reduce the wing angle. Porsche's got caught before the race and they had to fix the issue, Toyota did not get caught and ran the 24hrs of LeMan with it.

http://www.mulsannescorner.com/RCELeMans2014.html